What bit me

I was trimming the hedges yesterday and felt a bite above my heel.I looked down at what I thought I saw to be an ant and then knocked it off of.Immediately it began to hurt and itch but I'm used to fire ants here in GA so I anticipated having a few bites.I continued working w/out any other bitings and went in to shower.Later in the evening while watching tv and noticing that I kept hitting that particular spot and it always seemed sore.I felt the area and nothing.But noticed that my inner ankle was gone,it was completely swollen! They were no visible bite marks and was very tender and sore to touch.My DH made put ice on it for a bit.Today,it was still sore to walk and then I noticed it's still swollen and turning red.I monitor as the day goes on and now see a raised red bump.I try to 'pop' it and not much comes out.It's very itchy and sore.What is it?!

I was going to say that if you get stung by a scorpion you will know. Besides they won't go anywhere fast. But I'm not sure about baby scorpions.

This response is not necessary after the crusader and player4life's responses. The crusader said everything indeed. You are having a reaction to that bite. You need to help your body before it becomes overwhelmed with that venom it's trying to clean out. For it to have become edematous by evening, please go get it looked at.

I wouldn't walk on it as much. I'd let it rest cos the more work it does, the more blood your foot needs and the more swelling you are likely to have as the condition worsens.